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完成反应方程式: (1) Cu+HNO 3 ( 浓 ) —— (2) 用王水溶解 HgS (3) Cu+HNO 3 ( 稀 ) —— (4) CuCl 2 •2H 2 O Δ (5) [Cu(NH 3 ) 2 ] + + O 2 + NH 3 + H 2 O —— (6) 焊接用 ZnCl 2 浓溶液清除金属表面的氧化物( FeO )
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举一反三
【单选题】It is in the joints of human body that movements of the bones take place. The movement itself is caused by the pull of sheets and cords of very tough tissue(组织) called muscle. Muscle tissue has the sp...
A.
grows
B.
shortens
C.
relaxes
D.
pushed
【多选题】which elements inside the body can maintain the functions of heart beat ,muscle and nerve tissue movement? ( )
A.
calcium
B.
magnesium
C.
sodium
D.
potassium
【单选题】For some animals, locomotionis accomplished by changes in body shape.
A.
evolution
B.
movement
C.
survival
D.
escape
【多选题】which elements inside the body can maintain the functions of heart beat ,muscle and nerve tissue movement? ( )
A.
Calcium
B.
Magnesium
C.
Sodium
D.
Potassium
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